CN116873149A - Overall assembly and carrying method of ultra-large marine LNG fuel tanks - Google Patents
Overall assembly and carrying method of ultra-large marine LNG fuel tanks Download PDFInfo
- Publication number
- CN116873149A CN116873149A CN202310874612.2A CN202310874612A CN116873149A CN 116873149 A CN116873149 A CN 116873149A CN 202310874612 A CN202310874612 A CN 202310874612A CN 116873149 A CN116873149 A CN 116873149A
- Authority
- CN
- China
- Prior art keywords
- section
- block
- total
- inner bottom
- deck
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 46
- 239000002828 fuel tank Substances 0.000 title claims abstract description 40
- 238000011068 loading method Methods 0.000 claims abstract description 11
- 238000003466 welding Methods 0.000 claims description 24
- 239000000446 fuel Substances 0.000 claims description 7
- 210000001503 joint Anatomy 0.000 claims description 7
- 238000003780 insertion Methods 0.000 claims description 4
- 230000037431 insertion Effects 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B73/00—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms
- B63B73/10—Building or assembling vessels from prefabricated hull blocks, i.e. complete hull cross-sections
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B73/00—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms
- B63B73/30—Moving or transporting modules or hull blocks to assembly sites, e.g. by rolling, lifting or floating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B73/00—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms
- B63B73/40—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms characterised by joining methods
- B63B73/43—Welding, e.g. laser welding
Abstract
The application provides a method for assembling an LNG fuel tank assembly for a super-large ship, which comprises the following steps of S1, assembling an inner bottom assembly section into a normally constructed assembly; s2, a general group constructed in a four-spelling one-side mode in the bow-stern direction of the broadside general section; s3, a total group constructed horizontally in the half-width direction of a transverse compartment total section; s4, a deck total section is assembled into a normally constructed total group; and a loading and positioning control method for each total section lifting sequence in the loading stage. The method of the application obviously improves the construction speed and precision of the ultra-large MARK III type LNG fuel tank, can effectively control the flatness of the joint, and reduces the operation and reworking amount in the carrying process of the total group.
Description
Technical Field
The application relates to a ship manufacturing method, in particular to an aggregate of LNG fuel tanks for ultra-large ships and a carrying method.
Background
In the modern shipping field, energy conservation and environmental protection become the main development direction of ship transportation, the building order of LNG dual-fuel ships is increased day by day, the efficient and accurate building of ultra-large LNG fuel tanks becomes a key technical point of dual-fuel ship building, and an internal maintenance system has high-precision requirements on the flatness of the ship body. The traditional construction method carries out scattered hoisting and carrying on a plurality of sections, so that the control difficulty of the precision of the ship body in the carrying process is increased intangibly, the flatness control difficulty is high, the flatness ratio of the on-site operation adjusting structure is high, the reworking amount in the construction process is increased, the manpower and material resources are wasted, and the construction period is delayed. Therefore, the LNG fuel tank is in a totally new assembly carrying form, a plurality of segments are combined into a huge total section, relevant precision parameters are well controlled in the total section stage to meet relevant requirements, meanwhile, the number of carried and hoisted cranes is reduced, the utilization rate of the cranes is improved, the precision control difficulty is reduced, and the overall construction efficiency of the LNG fuel tank is greatly improved.
In the prior art, chinese patent 201910153224.9 discloses a ship total group carrying method, which comprises the steps of constructing a bottom section and a transverse bulkhead section of a ship into a plurality of total sections in a ground stage of the ship, constructing the total sections into a complete total group in a dock stage of the ship, and constructing a side section and a deck section of the ship to the total sections in sequence to finish carrying of the ship. Unlike the present application, which combines the inner bottom section, side section, transverse compartment section, deck section, etc. to form large section, the present application has no pre-control of relevant precision, raised precision integrity and accuracy.
Disclosure of Invention
The application aims to overcome the defects in the prior art and provides a total group of an ultra-large marine LNG fuel tank and a carrying method.
In order to achieve the above object, the present application provides the following technical solutions:
the method for assembling the LNG fuel tanks for the ultra-large ship comprises the following steps of:
step 1, normally building to form an inner bottom total section, normally building the outer bottom plates except for 4 inner bottom sections as jig frame surfaces, carrying out total assembly in the bow and stern directions of the ship and in the half-width direction, and simultaneously controlling the accuracy of the main dimension of the inner bottom total section and the flatness of the relevant inner surface;
step 2, constructing a side section in a side state, constructing 4 side sections by taking a side outer plate as a jig frame surface in a side state, carrying out a ship bow-stern and height direction total group, and simultaneously controlling the accuracy of the main dimension of the side section and the flatness of the relevant inner surface;
step 3, constructing a transverse compartment total section in a horizontal state, constructing the transverse compartment section in a horizontal state by taking a transverse compartment wall plate as a jig frame surface by 2 transverse compartment sections, performing total assembly in the half-width direction of the ship, and simultaneously controlling the accuracy of the main dimension of the transverse compartment total section and the flatness of the relevant inner surface;
and 4, normally building to form a deck total section, normally building 4 deck sections by taking the lower surface of the deck section as a jig frame surface, carrying out total assembly of the ship in the bow and stern and half-width directions, and simultaneously controlling the accuracy of the main dimension of the deck total section and the flatness of the relevant inner surface.
The carrying method of the ultra-large marine LNG fuel tank assembly comprises the following steps:
step 21, hoisting the insole block to a carrying platform to serve as a carrying foundation;
step 22, carrying the two side sections and the inner bottom section, positioning and then welding and fixing;
step 23, hoisting a transverse compartment main section for plug-in carrying and welding and fixing a broadside main section and an inner bottom main section;
and step 24, hoisting the deck block for plug-in carrying and welding and fixing the side block and the transverse compartment block.
In a further preferred embodiment, in the step 22, the side block and the inner bottom block are butted in the height and half width directions of the ship, and the deformation is preset in the half width direction of the ship.
According to a further preferred technical scheme, the method for presetting reverse deformation in the half-width direction of the ship comprises the following steps: the lower port of the broadside block is taken as a rotation datum point, the upper port of the broadside block is inclined outwards by 10-15mm, and the unilateral half width of the upper port of the broadside block is 10-15mm larger.
In a further preferred embodiment, in the step 23, the method for plug-in mounting includes the following steps:
step 231, collecting the overall accuracy states of the inner bottom block, the side block and the transverse compartment block by using a total station on the basis that the positioning and welding fixation of the side block and the inner bottom block are completed;
step 232, positioning by taking a straight line of a ship body center line on the inner bottom total section, which is reversely connected to the ground, as a reference, and controlling the matching degree of the center line of the transverse compartment total section and the center line of the inner bottom total section, wherein the out-of-tolerance is controlled within +/-3 mm;
step 233, using four corner levels of the inner bottom block as horizontal references to control overall impact force of the transverse compartment block, ensuring that impact force in a fore-aft direction is controlled within 10mm and aligned with 100mk lines of the side block and the inner bottom block, and measuring butt joint position structural points of the transverse compartment block and the side block;
and step 234, after the insertion of the transverse compartment is simulated and calculated by OTS software, the specific butt joint gap and interference condition of the structure of the transverse compartment main section and the structure of the broadside main section are adopted, and if interference exists, the interference position needs to be repaired in advance before carrying and hoisting, so that the smooth hoisting is ensured.
According to a further preferred technical scheme, the method for respectively controlling the accuracy of the main dimensions of the inner bottom total section, the side total section, the transverse compartment total section and the deck total section comprises the following steps: and the total station is used for controlling the half-width, the bow and stern and the main dimension of the ship in the height direction of the inner bottom block, the side block, the transverse compartment block and the deck block respectively by taking the datum line as the datum line.
According to a further preferred technical scheme, when the inner bottom total section, the side total section, the transverse compartment total section and the deck total section are combined together, the method for controlling the flatness comprises the following steps: in the butt welding process of the total group, strip clamping plates with the length of 1-1.5m are added on two sides of a welding line.
Further preferable technical scheme, when the inner bottom total section, the side total section, the transverse compartment total section and the deck total section are assembled together, the method for checking the flatness is as follows: and after the butt welding of the total assembly is finished, checking the peripheral area of the butt welding seam in the LNG fuel cabin by using a long straight caliper of 1m and 3m, wherein the flatness in the area of 1m is less than or equal to 4mm, the flatness in the area of 3m is less than or equal to 7mm, and if the problem of poor flatness is found, correcting the hull structure in time, and repeating the checking work.
The ultra-large marine LNG fuel tank assembly and the carrying method have the following beneficial effects in the practice of ship construction through use:
(1) According to the ultra-large marine LNG fuel tank assembly and the carrying method, in the ultra-large LNG fuel tank assembly and the carrying process, a plurality of segments are assembled together to form a large total segment, relevant precision points are pre-controlled in the total segment stage, and the precision integrity and the accuracy are improved.
(2) According to the ultra-large marine LNG fuel tank assembly and the carrying method, the multi-section assembly is formed into the huge total section, so that carrying and lifting times are reduced, the use cost of a crane is saved, the deformation is reduced, the flatness of the inner part of the LNG fuel tank is effectively controlled, the reworking phenomenon caused by poor flatness is reduced, and the working efficiency is greatly improved.
(3) According to the ultra-large marine LNG fuel tank assembly and the carrying method, the assembly state of the ultra-large LNG fuel tank is conveniently controlled in a new carrying and lifting sequence, so that the main size of the fuel tank is effectively controlled, and a mat is laid for the installation of a subsequent maintenance system.
Drawings
In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a diagram of a normal assembly of an inner bottom assembly of an ultra-large marine LNG fuel tank assembly and a mounting method of the application.
Fig. 2 is a side block diagram (starboard) of a side block assembly of an ultra-large marine LNG fuel tank assembly and a mounting method of the present application.
Fig. 3 is a diagram of a horizontal assembly of a super-huge marine LNG fuel tank assembly and a transverse bulkhead assembly of a loading method according to the present application.
Fig. 4 is a diagram of a normal assembly of deck blocks of an ultra-large marine LNG fuel tank assembly and a mounting method according to the present application.
Fig. 5 is a schematic view of a side block loading and hoisting of an oversized marine LNG fuel tank assembly and a loading method of the present application.
FIG. 6 is a schematic view showing a cross-hatch inserted loading and lifting method for an ultra-large marine LNG fuel tank assembly and loading method according to the present application
Fig. 7 is a schematic diagram of a deck block plug-in type loading and hoisting of an ultra-large marine LNG fuel tank assembly and a loading method according to the present application
The reference numerals in the figures are: 1-inner bottom block, 2-side block, 3-transverse compartment block and 4-deck block
Detailed Description
The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
The application will be further described in detail with reference to the drawings and specific examples, which should not be construed as limiting the scope of the application.
The utility model provides a total group and carrying method of extra large marine LNG fuel tank, LNG fuel tank includes interior bottom total section 1, broadside total section 2, and diaphragm cabin total section 3 and deck total section 4, includes following steps:
step 1, as shown in fig. 1, normally constructing to form an inner bottom total section 1, wherein the bottom plates except for 4 inner bottom sections are taken as jig frame surfaces for normal construction, performing a total assembly in a bow-stern and half-width direction, and simultaneously controlling the accuracy of the main dimension of the inner bottom total section 1 and the flatness of the relevant inner surface of a fuel tank;
step 2, as shown in fig. 2, performing side construction to form a side total section 2, performing side construction to 4 side sections 2 by taking a side outer plate as a jig frame surface, performing a total group of a bow and a stern and a height direction, and simultaneously controlling the accuracy of the main dimension of the side total section 2 and the flatness of the relevant inner surface of the fuel cabin;
step 3, as shown in fig. 3, constructing in a horizontal state to form a transverse compartment total section 3, constructing in a horizontal state by taking a transverse compartment wall plate as a jig frame surface by 2 transverse compartment sections 3, performing total assembly in a half-width direction, and simultaneously controlling the accuracy of the main dimension of the transverse compartment total section 3 and the flatness of the relevant inner surfaces of the fuel compartment;
and 4, as shown in fig. 4, normally constructing to form a deck total section 4, normally constructing 4 deck sections by taking the lower surface of the deck section as a jig frame surface, carrying out a total assembly in the bow-stern and half-width directions, and simultaneously controlling the accuracy of the main dimension of the deck total section 4 and the flatness of the relevant inner surface of the fuel tank.
In the process of assembly, the central line of the inner bottom total section 1 is reversely connected to the ground by using a total station to form a new positioning datum line, a foreign punching mark is made and a reflecting sheet is attached, and the total station is used for controlling the precision control of main dimensions such as half width, bow and stern, height direction and the like of each total section by taking the datum line as a datum line. In the welding process, strip clamping plates (about 1M) are added on two sides of a welding line to reduce the influence of welding deformation on the flatness of ship structures on two sides of the welding line, after welding is finished, the peripheral area of the butt welding line in an LNG fuel cabin is inspected by using 1M and 3M long straight calipers, the flatness in the 1M area is less than or equal to 4mm, the flatness in the 3M area is less than or equal to 7mm, if the problem of poor flatness is found, the ship structure is corrected in time, and the inspection work is repeated.
As shown in fig. 5, the total assembled inner bottom block 1 is used as a reference block, the side block 2 is respectively lifted and carried on the inner bottom block, butt joint is carried out in the height and half width directions, welding and fixing are carried out after positioning is finished, reverse deformation is preset in the half width direction, the lower opening of the side block is used as a rotation reference point, the upper opening is inclined outwards by 10-15mm, the single-side half width of the upper opening of the side block is 10-15mm, the total double-side full width is 20-30 mm, and the subsequent cross compartment insertion carrying and welding shrinkage deformation are facilitated.
The application reduces the total lifting times from the traditional 10 times to 6 times after optimizing the general side group form and the structural form.
As shown in fig. 6, after the positioning of the side block 2 and the inner bottom block 1 is finished, the transverse bulkhead block 3 is carried in an inserting mode, the inserting mode is that on the basis that the positioning of the side block 2 and the inner bottom block 1 is finished, the whole precision state of the block is collected by using a total station, the positioning is carried out by taking a straight cross section line of a hull center line on the inner bottom block 1, which is refuted on the ground, as a reference, the matching degree of the center line of the transverse bulkhead block 3 and the center line of the inner bottom block 1 is controlled, the overstep is controlled within +/-3 mm, the whole impact potential of the transverse bulkhead is controlled by taking the four corner level of the inner bottom block as a horizontal reference, the impact potential of the fore-aft direction is controlled within 10mm and aligned with 100mk line of a side structure and the inner bottom structure, meanwhile, the structural point of the abutting position of the transverse bulkhead block and the side structure is measured, after the insertion of the transverse bulkhead block is calculated by using an OTS software, the transverse bulkhead block and the side structure specifically abutting gap and interference condition are carried, if the interference condition exists, the interference position is required to be cut in advance, so that the lifting and the transverse bulkhead block is smoothly carried, the transverse bulkhead block and the end in the low-to be welded in the abutting direction, and the abutting direction of the side block is fixed.
As shown in fig. 7, after the loading and lifting of the transverse bulkhead segment 3 is completed, the lifting deck segment 4 is inserted and carried, is in butt joint with the transverse bulkhead segment 3 in the height direction, is in butt joint with the side bulkhead segment 2 in the height direction and the left-right direction, is positioned and is welded and fixed, and finally the whole fuel tank is formed in a closed loop to form a complete closed LNG fuel tank.
The above is only one implementation of the present application patent, and other similar method substitutions and structural substitutions are also possible based on the same idea, and are not limited to the steps and structural components already described. In summary, the scope of the application also includes other variations and alternatives that will be apparent to those skilled in the art.
Claims (8)
1. The method for assembling the LNG fuel tanks for the ultra-large ship comprises an inner bottom total section, a side total section, a transverse compartment total section and a deck total section, and is characterized by comprising the following steps of:
step 1, normally building to form an inner bottom total section, normally building the outer bottom plates except for 4 inner bottom sections as jig frame surfaces, carrying out total assembly in the bow and stern directions of the ship and in the half-width direction, and simultaneously controlling the accuracy of the main dimension of the inner bottom total section and the flatness of the relevant inner surface;
step 2, constructing a side section in a side state, constructing 4 side sections by taking a side outer plate as a jig frame surface in a side state, carrying out a ship bow-stern and height direction total group, and simultaneously controlling the accuracy of the main dimension of the side section and the flatness of the relevant inner surface;
step 3, constructing a transverse compartment total section in a horizontal state, constructing the transverse compartment section in a horizontal state by taking a transverse compartment wall plate as a jig frame surface by 2 transverse compartment sections, performing total assembly in the half-width direction of the ship, and simultaneously controlling the accuracy of the main dimension of the transverse compartment total section and the flatness of the relevant inner surface;
and 4, normally building to form a deck total section, normally building 4 deck sections by taking the lower surface of the deck section as a jig frame surface, carrying out total assembly of the ship in the bow and stern and half-width directions, and simultaneously controlling the accuracy of the main dimension of the deck total section and the flatness of the relevant inner surface.
2. The method for mounting an ultra-large marine LNG fuel tank assembly according to claim 1, comprising the steps of:
step 21, hoisting the insole block to a carrying platform to serve as a carrying foundation;
step 22, carrying the two side sections and the inner bottom section, positioning and then welding and fixing;
step 23, hoisting a transverse compartment main section for plug-in carrying and welding and fixing a broadside main section and an inner bottom main section;
and step 24, hoisting the deck block for plug-in carrying and welding and fixing the side block and the transverse compartment block.
3. The method for loading the LNG fuel tanks for ultra-large ships according to claim 2, wherein in the step 22, the side block and the inner bottom block are butted in the height and half width directions of the ship, and the reverse deformation is preset in the half width direction of the ship.
4. The method for carrying the ultra-large marine LNG fuel tank assembly according to claim 3, wherein the method for presetting reverse deformation in the half-width direction of the ship is as follows: the lower port of the broadside block is taken as a rotation datum point, the upper port of the broadside block is inclined outwards by 10-15mm, and the unilateral half width of the upper port of the broadside block is 10-15mm larger.
5. The method for mounting the LNG fuel tanks for the ultra-large ship after the assembly according to claim 2, wherein the step 23 is a plug-in mounting method comprising the steps of:
step 231, collecting the overall accuracy states of the inner bottom block, the side block and the transverse compartment block by using a total station on the basis that the positioning and welding fixation of the side block and the inner bottom block are completed;
step 232, positioning by taking a straight line of a ship body center line on the inner bottom total section, which is reversely connected to the ground, as a reference, and controlling the matching degree of the center line of the transverse compartment total section and the center line of the inner bottom total section, wherein the out-of-tolerance is controlled within +/-3 mm;
step 233, using four corner levels of the inner bottom block as horizontal references to control overall impact force of the transverse compartment block, ensuring that impact force in a fore-aft direction is controlled within 10mm and aligned with 100mk lines of the side block and the inner bottom block, and measuring butt joint position structural points of the transverse compartment block and the side block;
and step 234, after the insertion of the transverse compartment is simulated and calculated by OTS software, the specific butt joint gap and interference condition of the structure of the transverse compartment main section and the structure of the broadside main section are adopted, and if interference exists, the interference position needs to be repaired in advance before carrying and hoisting, so that the smooth hoisting is ensured.
6. The method for assembling the ultra-large marine LNG fuel tanks according to claim 1, wherein the method for controlling the accuracy of the main dimensions of the inner bottom block, the side block, the cross-deck block and the deck block, respectively, comprises the steps of: and the total station is used for controlling the half-width, the bow and stern and the main dimension of the ship in the height direction of the inner bottom block, the side block, the transverse compartment block and the deck block respectively by taking the datum line as the datum line.
7. The method for assembling the ultra-large marine LNG fuel tanks according to claim 1, wherein the method for controlling flatness when the inner bottom section, the side section, the cross deck section and the deck section are assembled together is as follows: in the butt welding process of the total group, strip clamping plates with the length of 1-1.5m are added on two sides of a welding line.
8. The method for assembling the LNG fuel tanks for the ultra-large ship according to claim 7, wherein when the inner bottom section, the side section, the cross deck section and the deck section are assembled together, the method for checking flatness is as follows: and after the butt welding of the total assembly is finished, checking the peripheral area of the butt welding seam in the LNG fuel cabin by using a long straight caliper of 1m and 3m, wherein the flatness in the area of 1m is less than or equal to 4mm, the flatness in the area of 3m is less than or equal to 7mm, and if the problem of poor flatness is found, correcting the hull structure in time, and repeating the checking work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310874612.2A CN116873149A (en) | 2023-07-17 | 2023-07-17 | Overall assembly and carrying method of ultra-large marine LNG fuel tanks |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310874612.2A CN116873149A (en) | 2023-07-17 | 2023-07-17 | Overall assembly and carrying method of ultra-large marine LNG fuel tanks |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116873149A true CN116873149A (en) | 2023-10-13 |
Family
ID=88265823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310874612.2A Pending CN116873149A (en) | 2023-07-17 | 2023-07-17 | Overall assembly and carrying method of ultra-large marine LNG fuel tanks |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116873149A (en) |
-
2023
- 2023-07-17 CN CN202310874612.2A patent/CN116873149A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109850066B (en) | Ship assembly carrying method | |
| CN110091958B (en) | Ship body section non-allowance construction process method | |
| CN110182303B (en) | General assembly method of rudder horn | |
| CN113955044B (en) | Method for carrying container ship LNG tank block, LNG tank block and container ship | |
| CN111532372B (en) | Integrated inspection channel for ballast tank of ore carrier and construction method thereof | |
| CN114033051A (en) | Large-span hyperbolic truss construction process based on steel structure spherical curtain cinema engineering | |
| CN112144408A (en) | Construction method for building assembled trestle | |
| CN113911284A (en) | Precision control method for assembling and carrying P-type total sections on chemical ship | |
| CN110789684A (en) | Method for assembling large deck machinery body base | |
| CN116873149A (en) | Overall assembly and carrying method of ultra-large marine LNG fuel tanks | |
| CN112078749B (en) | General assembly supporting method for single-shell fuel tank | |
| CN113320659A (en) | Method for assembling flange and barrel of double-angle steering oar of ship | |
| CN110789678A (en) | Method for butt joint assembly of bottom sections of chemical ship | |
| CN110979595B (en) | Sea damage ship repairing method | |
| CN212332873U (en) | Integrated inspection channel for ballast tank of ore carrier | |
| CN111139808B (en) | Method for carrying cantilever beam of self-elevating drilling platform | |
| CN211731777U (en) | Tool for manufacturing rudder | |
| CN114455026A (en) | Ship body section slipway large folding method | |
| CN112027021B (en) | Ship anchor recess positioning and mounting method | |
| CN112124518A (en) | Control method for sectional reinforcement of double-phase stainless steel trough | |
| CN114735155B (en) | Installation method of corner guide rail of container ship | |
| CN103406732A (en) | Sectional manufacturing process for pile leg flat pallet | |
| CN219053291U (en) | Super-large-section double-wall reinforced concrete beam with ribs | |
| CN216195718U (en) | Combined steel box shear wall | |
| CN116118973A (en) | Loose hook constraint welding method for carrying LNG ship transverse compartment block |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |